Trademark registration class 30 generally covers goods related to coffee, tea and cocoa. The following are some common category 30 contents:

1. Coffee: including coffee beans, ground coffee, instant coffee, coffee powder, etc.

2. Tea: including tea leaves, tea bags, tea mixtures, tea drinks, etc.

3. Cocoa and cocoa products: including cocoa beans, cocoa powder, chocolate, cocoa drinks, etc.

4. Coffee substitutes: including coffee substitutes, coffee mates, ready-to-drink coffee substitutes, etc.

5. Coffee and tea condiments: including coffee condiments, tea condiments, spices, sugar, etc.

6. Coffee and tea making equipment: including coffee machines, coffee pots, tea sets, teapots, etc.

It should be noted that the above are just some common contents of Category 30, and the actual scope may be wider. During the trademark registration process, you can choose the appropriate category based on your specific goods.

If you have questions about choosing a trademark registration category, it is recommended to consult a local trademark registration agency or a professional lawyer for accurate guidance and advice.

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